Finding the Fourth Proportional to 720,650,481.76, 994,471,012.20 and 390,618,534.88
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Solution
The fourth proportional to 720,650,481.76, 994,471,012.20 and 390,618,534.88 is: 539,039,131.45
Step by Step Solution
- Step 1: Write the proportion equation
720,650,481.76 : 994,471,012.20 = 390,618,534.88 : x - Step 2: Convert to fraction form
720,650,481.76/994,471,012.20 = 390,618,534.88/x - Step 3: Cross multiply
720,650,481.76x = 994,471,012.20 × 390,618,534.88 - Step 4: Simplify right side
720,650,481.76x = 388,458,809,766,194,624 - Step 5: Solve for x
x = 388,458,809,766,194,624/720,650,481.76 - Step 6: Final answer
x = 539,039,131.45
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.